Microwave synthesis of aligned carbon nanotubes in a single mode cavity

Jiping Cheng, Dinesh Kumar Agrawal, Yunjin Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Using a 2.45 GHz wave-guided cavity, in a single mode TE103 excitation, we were able to physically locate a small sample separately at the H (magnetic) node (where the E field is nearly zero), and the E (electric) node (where H field is nearly zero). Various materials, such as ceramics, powdered metals and composites, exhibited remarkable differences in their microwave heating behaviors [1,2], Well-aligned multiwall carbon nanotubes (CNTs) have been synthesized on Fe-coated Si wafers in this single mode microwave cavity using acetylene as the carbon source at temperature ranges of 700-800° in 5-10 minutes. The average length of microwave synthesized CNTs was around10-15 microns. The diameter of microwave synthesized CNTs could be controlled form 30 nm to 150 nm by adjusting the acetylene/hydrogen ratio. Higher acetylene concentration produced larger diameter CNTs. The differences of microwave synthesis of CNTs in E and H fields were investigated as well.

Original languageEnglish (US)
Title of host publication2004 AIChE Annual Meeting, Conference Proceedings
Pages1735
Number of pages1
StatePublished - 2004
Event2004 AIChE Annual Meeting - Austin, TX, United States
Duration: Nov 7 2004Nov 12 2004

Other

Other2004 AIChE Annual Meeting
CountryUnited States
CityAustin, TX
Period11/7/0411/12/04

Fingerprint

Carbon nanotubes
Microwaves
Acetylene
Microwave heating
Guided electromagnetic wave propagation
Cermets
Hydrogen
Carbon
Composite materials
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Cheng, J., Agrawal, D. K., & Zhang, Y. (2004). Microwave synthesis of aligned carbon nanotubes in a single mode cavity. In 2004 AIChE Annual Meeting, Conference Proceedings (pp. 1735)
Cheng, Jiping ; Agrawal, Dinesh Kumar ; Zhang, Yunjin. / Microwave synthesis of aligned carbon nanotubes in a single mode cavity. 2004 AIChE Annual Meeting, Conference Proceedings. 2004. pp. 1735
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Cheng, J, Agrawal, DK & Zhang, Y 2004, Microwave synthesis of aligned carbon nanotubes in a single mode cavity. in 2004 AIChE Annual Meeting, Conference Proceedings. pp. 1735, 2004 AIChE Annual Meeting, Austin, TX, United States, 11/7/04.

Microwave synthesis of aligned carbon nanotubes in a single mode cavity. / Cheng, Jiping; Agrawal, Dinesh Kumar; Zhang, Yunjin.

2004 AIChE Annual Meeting, Conference Proceedings. 2004. p. 1735.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Cheng J, Agrawal DK, Zhang Y. Microwave synthesis of aligned carbon nanotubes in a single mode cavity. In 2004 AIChE Annual Meeting, Conference Proceedings. 2004. p. 1735